在FabricJS中，如何通过一组在鼠标单击的坐标处重叠的对象进行识别？

canvas.on('mouse:down', function(event) {
  var clickX = event.e.clientX;
  var clickY = event.e.clientY;

  var overlappingObjects = [];
  var objects = canvas.getObjects();

  for (var i = 0; i < objects.length; i++) {
    var object = objects[i];
    var boundingRect = object.getBoundingRect();

    if (clickX >= boundingRect.left && clickX <= boundingRect.left + boundingRect.width &&
        clickY >= boundingRect.top && clickY <= boundingRect.top + boundingRect.height) {
      overlappingObjects.push(object);
    }
  }

  // 根据业务需求选择合适的策略进行识别
  if (overlappingObjects.length > 0) {
    var recognizedObject = overlappingObjects[overlappingObjects.length - 1];
    console.log('识别结果：', recognizedObject);
  } else {
    console.log('未识别到重叠对象');
  }
});